code: def sqrt_fixed(x, prec):
      return isqrt_fast(x << prec)
  
imports: import math
  from bisect import bisect
  from .backend import xrange
  from .backend import BACKEND, gmpy, sage, sage_utils, MPZ, MPZ_ONE, MPZ_ZERO
label_desc: Use image node_id 16 for calling a global function with example usage: sqrt_fixed(x, prec) and returns: isqrt_fast